# How do I model an arch gate made from big bricks?

How do I model these connecting bricks with 5 edges while keeping them aligning with the curvature of the arch and the side of the bricks with 4 edges? I tried to recreating that by cutting these shapes on a plane, but this solution is not accurate enough. On the picture you can also see that the grooves are slightly beveled.

After sleeping on it, I think what you need is an arch made of bricks that take the same length of the arc, and snap to the coordinates of the horizontal bricks. Since this is a modeling question, not geometry nodes, here's a manual solution:

1. Spawn a circle with 16-32 vertices (I'm doing 24)

1. Create yourself lines aligned to the grid, which will represent the brick layers. Then $$\color{#888}{█0█}$$ hover mouse cursor over the circle L to select it, I to inset, and align the new loop so that the red edge ends at the green line:

1. In ortographic mode you can zoom in and easily adjust using S scaling, so that the positioning will be good even by perfectionist standards.

2. Press I again, and drag it to create roughly a square on the first layer of bricks:

1. You can now remove the bottom of the circle, and the right side, because later you will mirror it:

1. We have one vertex at an intersection of two straight lines and a circular loop, created in points 2-3, now travel along the circular loop and using GG shortcut, slide the vertices to align them in the same way, each time going one brick layer higher:

1. Again like in p. 3. You may want to zoom in to align better. For the worst case of OCD-perfectionism combination, you can also round the Y coordinate in the N Numbers panel:

1. Select the middle loop and subdivide it, move each just created vertex to the connected vertex above (snap it), and then move it again, lock the $$x$$ axis and snap to the lower connected vertex:

1. Delete the outer loop, vertex at origin and guiding horizontal lines.

2. Move bottom edges to the left to make the brick longer like in the reference image:

1. If you want 2 bottom bricks to be long, you need to make sure the first from the bottom is entirely horizontal:

1. The rest is hopefully straight-forward: